sponge off of

sponge (something) off (of) (someone or something)

To beg for, borrow, or obtain something (usually money or food) as a handout from someone or something else. My brother's been sponging money off my parents ever since he dropped out of college. My roommate's nice, but she's always sponging food off of me, and I don't have the heart to tell her to stop.
See also: off, sponge
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

sponge something off of someone or something

 and sponge something off
to beg or borrow money or food from someone or a group. Please stop sponging food and money off your relatives! Stop sponging off food and money all the time!
See also: of, off, sponge
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in classic literature ?
"He tried to sponge off of me, but I put a stop to that good and quick," Von Schmidt had said to the reporter.